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In 16th century Spain, the sargento mayor ("sergeant major") was a general officer. He commanded an army's infantry, and ranked about third in the army's command structure; he also acted as a sort of chief of staff to the army's commander.

In the 17th century, sergeant majors appeared in individual regiments. These were field officers, third in command of their regiments (after their colonels and lieutenant colonels), with a role similar to the older, army-level sergeant majors (although obviously on a smaller scale). The older position became known as "sergeant major general" to distinguish it. Over time, the term sergeant was dropped from both titles, giving rise to the modern ranks of major and major general.

The full title of sergeant major fell out of use until the latter part of the 18th century, when it began to be applied to the senior non-commissioned officer of an infantry battalion or cavalry regiment. It is about this time that the U.S. and British histories of the title diverge, with the American Revolutionary War.

A sergeant major is an appointment, not a rank. It is normally held by the senior warrant officer of an army or marine unit. These appointments are made at several levels, for example: the senior warrant officer of a company, battery or squadron; the senior warrant officer of a battalion or regiment. The title normally consists of the unit title (e.g. 'company') followed by 'sergeant major', and abbreviated by the initials (e.g. CSM). A sergeant major of a regiment or battalion is known as a regimental sergeant major, rather than a "regiment sergeant major" or "battalion sergeant major". In the Australian Defence Force, in addition to CSMs and RSMs, the most senior warrant officer of the army carries the appointment (and special insignia) of Regimental Sergeant Major of the Army (RSM-A).

The sergeant-major of a unit is normally directly responsible to the commanding officer for all matters pertaining to dress, deportment, discipline, conduct, performance, standards and morale of the non-commissioned members (NCMs) of that unit. Sergeant majors are normally addressed as "sir" or "ma'am" by subordinates, and as "sergeant major" or by their full title (or its abbreviation) by superiors.

In the British Armed Forces, the plural is sergeant majors and not sergeants major as it is in the United States.[1][2][3]

The most senior warrant officer in the Australian Army holds the unique rank of warrant officer (introduced in 1991 and senior to WO1) and the appointment of Regimental Sergeant Major of the Army (RSM-A). The RSM-A is responsible to the Chief of Army, but responsive to all ranks across the Army. The RSM-A is a member of the personal staff of the Chief of Army. The post of RSM-A has existed since January 1983 and was held by a WO1 until 1991. The RSM-A is the equivalent of the Royal Australian Navy's Warrant Officer of the Navy (WO-N) and the Royal Australian Air Force's Warrant Officer of the Air Force (WOFF-AF).[4]

The RSM-A’s primary role is to represent to the Chief of Army and others, the solicited and unsolicited views, concerns and opinions of soldiers in the army, but also carry the Chief of Army’s message down and across the ranks.[4]

The appointment of sergeant major is given to the senior non-commissioned member within sub-units, units and some formations of the Canadian Army.

The regimental sergeant-major is the senior sergeant major in a battalion-sized unit, including infantry battalions and artillery, armoured, engineer, and signal regiments. This appointment is normally held by a chief warrant officer. The same position can also be held by a master warrant officer in anticipation of promotion, or a shortage of available chief warrant officers.

In company-sized units, the company sergeant-major generally holds the rank of master warrant officer, although in some cases, it may be held by a warrant officer if the company is smaller, or in a shortage of available master warrant officers. In artillery batteries, this appointment is known as battery sergeant-major, while in units with a cavalry heritage (armoured, combat engineer, and signals squadrons), the term is squadron sergeant-major.

In company-sized sub-units of battalions or regiments, the company sergeant-major (or equivalent) normally answers both to his or her officer commanding for matters pertaining to the company in particular, and to the regimental sergeant-major on matters of concern to the regimental sergeant-major. Company sergeant-majors and their equivalents are normally addressed as "Sergeant-Major" or by rank. By subordinates, they are referred to as "Sir", "Ma'am", or "Warrant" (for warrant officers) as appropriate. "CSM" ("BSM", "SSM") is a title normally reserved for use by the commanding officer.[citation needed]

Regimental sergeant-majors are never addressed as "Sergeant-Major". They are addressed by rank or as "Mr (Surname)" or "Ms (Surname)", and thereafter by subordinates as "Sir" or "Ma'am". "RSM" is reserved for use by the commanding officer.[citation needed]

A sergeant major appointment exists in each military unit from company to division/formation. Their main job is to assist the commander in the discipline and welfare of the enlisted men. Their authority and responsibility at parades and ceremonies extends over even commissioned officers while on the parade square. In the Singapore Armed Forces, two kinds of sergeant major exist, a regimental sergeant major and a company sergeant major. A regimental sergeant major may be placed in charge of a battalion, brigade, division or service level. A regimental sergeant major could also be appointed as RSM for a vocation, i.e. infantry vocation/formation sergeant major. This appointment is usually held by a senior warrant officer or a master warrant officer, although at times a 1st warrant officer may be appointed. A company sergeant major may be a 1WO, 2WO and 3WO. Sometimes, a master sergeant or a staff sergeant may be appointed. Military Experts of rank ME 3 could also be sergeant majors, in-charge of logistical units or naval units. This practice is also mirrored in the National Cadet Corps with the master sergeant or staff sergeant being appointed as unit sergeant major. Also, some schools with more than one unit, i.e. having a land as well as a sea unit, might appointed an RSM from either unit.

In Sri Lanka, the rank of sergeant major exists in the Sri Lanka Army and Sri Lanka Police Service. In the army, a warrant officer 2nd class is known as a sergeant major; while a warrant officer 1st class is a regimental sergeant major. In the police, the most senior non-gazetted officer rank is police sergeant major.

As described above, sergeant-major is not a rank, but an appointment held by a warrant officer class 1 or warrant officer class 2. Regardless of the appointment, the warrant officer is addressed as "sergeant-major".

The rank was established in the Union Defence Forces in 1913, in a single class. The rank badge was a crown, senior appointments being indicated by a wreath around the badge.[6]

The rank was divided into two classes in 1921. The national coat of arms was assigned as the badge of the 1st class, and the crown was assigned to the 2nd class. In both classes, senior appointments were indicated by a wreath around the badge.[6]

From 1957 to 2002, all warrant officers 1st class wore the wreathed coat of arms, and the warrant officer 2nd class wore the plain coat of arms.[6] Since 2002, all warrant officers have worn the new national coat of arms, the classes and appointments being indicated by the shape of the surrounding frame, and the addition of stars and crossed swords above the arms.

In the British Army and Royal Marines, company/battery/squadron sergeant major is an appointment for a WO2 and regimental sergeant major is a WO1 appointment.

Due to differences in nomenclature between Regiments and Corps, sergeant majors' titles do vary; squadron sergeant major and battery sergeant major for instance would be found in the cavalry and Royal Artillery respectively, and in the Royal Electrical and Mechanical Engineers, there are the appointments of artificer sergeant major.

Sergeant major instructor is an appointment held by warrant officers class 1 in the Small Arms School Corps and the Army Physical Training Corps and by some WO1s in the Royal Engineers. It is also an appointment held by some of the civilian adult instructors in the Army Cadet Force.

The posts of regimental and squadron corporal major are the Household Cavalry's equivalent of sergeant majors, as the Household Cavalry traditionally does not have ranks named sergeant. The Rifles use the spelling "serjeant major".

The first British use of the term was around 1680 and was applied to the senior sergeant in the colonel's company of an infantry regiment,[10] but it wasn't formalised until 1797, when the sergeant major was added to the battalion or regimental staff. When chevrons were introduced as badges of rank, he wore four, later under a crown.

In 1813, cavalry regiments introduced the troop sergeant major to replace the quartermaster as the senior NCO of a troop; this required the existing position to be explicitly redesignated the regimental sergeant major. Later, the rise of the squadron as the principal sub-regimental unit saw the corresponding introduction of the squadron sergeant major. The infantry, however, hung on to the undifferentiated, one-per-battalion sergeant major until the eve of the First World War, when the introduction of the company sergeant major forced them to adopt the RSM title as well. (As an infantry regiment could be, and usually was, made up of a number of battalions, one would logically expect the new title to be battalion sergeant major rather than regimental sergeant major. Perhaps the infantry felt this would imply a lower status than their cavalry equivalents.)

In 1881, the cavalry RSM and infantry sergeant major were among a number of senior non-commissioned positions that were confirmed with warrants, making them warrant officers. This was extended and rationalised in 1915, with the introduction of the new ranks of warrant officer class I (WOI) and warrant officer class II (WOII). RSM became an appointment of the former, CSM and SSM of the latter.

The Royal Marines continued to use a single rank of sergeant major, equating to warrant officer class I, until after the Second World War, when they adopted the Army system.

The Royal Flying Corps and its successor the Royal Air Force used the ranks of sergeant-major class I and II instead of warrant officer class I and II until the 1930s, when the RAF adopted the Army-style ranks. The RAF has not used sergeant major as either a rank or an appointment since that time.

In France, the rank of sergent-major (distinct from the rank of major) was created in 1776. He was the highest ranked non-commissioned officer (French: bas-officier) in the infantry company; the equivalent in the cavalry was the maréchal-des-logis-chef. The sergeant-major was charged with the administration of the company. Under the Ancien Regime, the equivalent at the general staff headquarters of the regiment was the adjudant sous-officiers, a rank which was also established in 1776, who was the senior NCO of the regiment.

Following the reforms of the Franco-Prussian War of 1870, it became harder to ascend to the officer corps, due to primarily age restrictions. With the addition of an adjudant (warrant officer) in each company, the sergeant-major became limited to purely administrative functions.

The rank was replaced with that of sergent-chef in 1928. The rank was re-established from 1942 until 1962 between sergent-chef and adjudant as the NCO in charge of the accounting responsibility of the company. There were no promotions to sergeant-major after 1964 and the rank was formally abolished in 1971. The last NCO to have held the rank retired in 1985.

The רב-סמל מתקדם (Rav samal mitkadem, "sergeant major") and the רב-סמל בכיר (Rav samal bakhír, "command sergeant major") are both non-commissioned officers (נגדים) ranks in the Israel Defense Forces (IDF). Because the IDF is an integrated force, they have a unique rank structure. IDF ranks are the same in all services (army, navy, air force, etc.). The ranks are derived from those of the paramilitary Haganah developed in the British Mandate of Palestine period to protect the Yishuv. This origin is reflected in the slightly-compacted IDF rank structure.

The first official U.S. use of the term was in 1776, when a sergeant major was appointed to the headquarters of each infantry battalion (or regiment, the two designations being used interchangeably) of the Continental Army. The original insignia of rank was an epaulette, or strip, of red cloth sewn on each shoulder of the uniform coat. In the years between 1776 and 1851, the sergeant major rank insignia went through several changes until the "classic" pattern worn during the Civil War and throughout the Indian Wars was adopted. Generally, these styles included either staff non-commissioned officer (SNCO) epaulettes, chevrons, or a combination of both. (During this period, the rank insignia for the several SNCO ranks of sergeant major, quartermaster sergeant, drum major, and fife major were identical.) In 1821, SNCOs received a single yellow chevron, point up, above the elbow on each sleeve. (Company grade officers, including the new officer grade of "adjutant", ranking above captain and below major, and non-commissioned officers or NCOs, viz., sergeants and corporals, all received chevrons of various colors, materials, patterns, and placement as their insignia of rank.) In 1825, the sergeant major chevron insignia was changed to be identical to that of the adjutant, by adding an inverted arc below the chevron (very similar in design to the modern private first class insignia), although in a different color (yellow vice gold or silver) and material (worsted vice lace) than that of the officer rank. In 1832, SNCOs returned to a rank insignia denoted by elaborate epaulettes without the chevrons. All SNCOs and NCOs returned to having chevrons as their rank insignia in 1847, when a completely new system of insignia was introduced. This was the first implementation of the three chevrons over three arcs design (with the chevrons worn point-up) of the "traditional" sergeant major rank insignia. (The quartermaster finally received a distinctive rank insignia—three chevrons over three horizontal bars—and for the first time, the first sergeant, or orderly sergeant, received a distinctive rank insignia—three chevrons surmounting a lozenge.) Finally, in 1851, the Army inverted the SNCO and NCO insignia again to be point-down. (Perrenot, 2011)[12]

The rank was in use by both the Union Army and the Confederate Army during the American Civil War. At that time, it was the highest enlisted rank, being just above quartermaster sergeant. The same rank insignia, three point-down chevrons under three arcs, was used by both armies. Both armies varied the color of the stripes by assigning red for artillery, yellow for cavalry, and blue for infantry. Some Confederate militia units varied these colors even farther and had other colors, including black stripes, for various units.

In 1920, with the standardization of the army's enlisted pay grades, it ceased to be a title of rank or grade. However, it survived as the job title of the senior NCO of a battalion and was re-introduced as a rank in 1958 when Congress authorized the E–8 and E–9 pay grades (P.L. 85-422, 72 Stat. 122). This new iteration of sergeant major as a discrete grade of rank saw the new rank insignia of three chevrons above three arcs with a five pointed star between the chevrons and arcs. In that law (as amended), the authorized daily average number of enlisted members on active duty in an armed force in pay grade E–9 in a fiscal year may not be more than 1.25 percent, respectively, of the number of enlisted members of that armed force, subject to certain exceptions.[13] A new insignia was authorized by DA Message 865848, 28 May 1968, for sergeants major assigned at the principal NCO of battalion and higher level command (viz., command sergeants major). This insignia was the same as the sergeant major insignia except the star was small and a wreath was placed around the star.

The appointment of Sergeant Major of the Army was created on July 4, 1966 and in 1979 received the unique grade of rank insignia of three chevrons above three arcs with two stars centered between the bottom chevron and the upper arc. In 1994 The insignia for Sergeant Major of the Army was changed to add the Coat of Arms of the United States between the two stars in the center of the insignia. The pin-on insignia is polished gold-plated with a black enamel background.[14]

The U.S. Marine Corps' first sergeant major was Archibald Sommers, appointed on January 1, 1801. This was originally a solitary post, similar to the modern Sergeant Major of the Marine Corps, but by 1899 there were five sergeants major. The title was abolished in 1946, but re-introduced as a rank in 1954. The post of Sergeant Major of the Marine Corps was established in 1957, as the senior enlisted advisor to the Commandant of the Marine Corps.[15]

The leadership variation—command sergeant major (CSM)—is the senior enlisted advisor to the commanding officer. The leadership position carries with it certain ceremonial functions such as caring for the unit's colors (flag). Additionally, CSMs serve as monitors of, and advocates for, the enlisted soldiers in the command. This position mostly exists in units of battalion size and larger.

Because the CSM represents all of the enlisted soldiers in the command, CSMs assigned to units above brigade do not wear the collar insignia of his or her career specialty (e.g., infantry, quartermaster, intelligence, inter alia), but instead wears the CSM (formerly "branch immaterial") collar insignia. The insignia is a gold-color rendering of the coat of arms of the United States; like the branch of service insignia of all U.S. Army enlisted soldiers, it is placed upon a gold-colored metal disk, one inch in diameter.

Both the SGM and CSM are referred to, and addressed as, "Sergeant Major". The Sergeant Major of the Army is a separate and unique position, but is still addressed as "Sergeant Major".

Sergeants Major of the Army. ISBN0-16-067866-8, CMH Pub. 70-63-1. By CSM Daniel K. Elder, et al. Describes the origin and growth of the Office of the Sergeant Major of the Army. Includes biographies of each of the Sergeants Major of the Army.

^ The Institute of Heraldry, History of U.S. Army Enlisted Ranks "Archived copy". Archived from the original on 13 January 2015. Retrieved 2 July 2015.Cite uses deprecated parameter |deadurl= (help)CS1 maint: archived copy as title (link). Retrieved June 23, 2017.